Fire-extinguisher.



PATENTBD JAN. 24', 1905.

H. w. MIX. FIRE EXTINGUISHER.

APPLI'UA TIOH TILED MAR. 9, 1904.

- ATTORNEY Patented January 24, 1905.

PATENT OFFICE.

HARVEY W. MIX, OF VANCOUVER, CANADA.

FIRE-EXTINGUISHER.

SPECIFICATION forming part of Letters Patent No, 780,898, dated January24, 1905. Application filed March 9,1904. Serial No. 197,207.

To (tlZ whom it may concern:

extinguisher of that class wherein carbonic acid gas is generated whenthe apparatus is required by the admixture of an acid to acarbonatedsolution, and my effort has been to provide an extremely simpleconstruction that will be certain in its action and to so reduce theweight of the apparatus and adapt its form that it may be used by womenor children if occasion should so require.

The construction and operation of my device are fully explained in thefollowing specification and illustrated in the drawing which accompaniesit, which represents a longitudinal section of the device.

It consists of an elongated cylindrical vessel 2 of comparatively smalldiameter in proportion to its length. At one end of this vessel asection 3 is divided off by an inwardly projecting annular partition 4.This divided section 3 is designed to receive a closed bottle of acid,(represented by 5,) and this extreme end of the vessel is closed with acap or plug 6, removablyattached to the body of the vessel by ascrew-thread. Through thecenter of this plug 6 is screwed a stem 7,having a pointed inner end 8 and at the outer end a cross-handle 9, bywhich the stem may be turned and by virtue of the screw-thread may beinserted into or withdrawn from the section 3 of the vessel. The stem 7passes through a packed gland 10 in the cap 6, by which leakage of thecontents of the vessel past the stem is'prevented, particularly when thegas-presing the flow through it.

The application of the device is extremely simple. The stop-cock 12being closed, the vessel is filled with a solution of a carbonate ofsoda or similar material, and the glass bottle 5, holding the acid, isinverted in the section 3, with its neck through the central aperture.The cap-plug 6 is screwed tightly in place, its central stem 7 beingwithdrawn, so that its tapered endis clear of the bottle 5.

If considered necessary, a lock-pin 15 may be inserted through the stem7 exterior to the gland .to prevent the stem being inadvertently screweddown on the bottle.

When desired to be used, the handle 9 is turned, and the point 8 of thescrewed stem 7 is thereby forced against the bottle 5, which it readilyfractures, and the carbonic-acid gas is immediately generated by theadmixture of the acid of the solution of soda, the pressure ofgeneration being itself sufiicient to project a stream of carbonated.water with considerable force when the stop-cock is opened for thatpurpose.

I am aware that prior to my invention fireextinguishers have beenprovided in which carbonated water is generated when required by theadmixture of suitable materials; but such admixture has depended eitheron the overturning of the vessel containing the acid or the breaking ofa glass bottle of acid by a plunger from without or a weight within thevessel; but these devices form a cumbersome and comparativelyheavyapparatus, and as the operation-of the plunger or the weight frequentlyrequires a considerable impact to cause the fracture of the bottle theyare not adapted for general domestic use where a woman or child isfrequently alone in the time of emergency.

In my device the pointed stem having a screw-thread affords an efiectiveand convenient means of fracturing the acid-bottle and one which a childcan readily understand and use when required, while the comparativelysmall diameter of the vessel enables it tobe made of very lightmaterial, while sufiiciently strong to stand the pressure ofthe'generated gas, and the necessary volume being provided by extralength enables the jet to be more readily projected toward a fire.

I therefore claim as new and desire to be protected in by-LettersPatent- 1. In a fire-extinguisher, an elongated cylindrical vesselhaving a conically-shaped end, said comically-shaped end having athreaded aperture at the apex, at stop-cock having a threaded shank forcooperating with the threaded aperture of the conical portion of thevessel, and the other end of the said vessel being internallyscrew-threaded, an integrallyformed apertured diaphragm formed near saidinternally-threaded end and adapted to receive a sealed vessel having aneck for proj eeting through the aperture of the diaphragm, ascrew-threaded closure member for said internally-threaded end of thevessel, and means carried by said screw threaded member for puncturingor breaking said sealed vessel when desired.

2. In a fire-extinguisher, an elongated cylindrical vessel having aconically-shaped end, said conically-shaped end having a threadedaperture at the apex, a stop-cock having a threaded shank forcooperating With the threaded aperture of the conical portion of thevessel, and the other end of the said vessel beinginternallyscrew-threaded,an integrallyformed apertured diaphragm formed near saidinternally-threaded end and adapted to receive a sealed vessel having aneck for projecting through the apertureof thediaphragm,ascrew- 3. In afire-extinguisher, an elongated cylindrical vessel having adischarge-aperture at one end, a stop-cock held in said aperture, saidvessel being formed near its opposite end with an integrally-formedapertured diaphragm, and said vessel at the diaphragm end beinginternally threaded, a screw-threaded closure member for cooperatingwith said internallythreaded end, said closure member having a threadedaperture and provided with a gland, a threaded stem passing through saidgland and aperture to cooperate with the screwthreaded portion of theaperture and terminating in a pointed end, said internal diaphragm beingso arranged as to form a chamber between it and the closure member, asealed vessel having a neck held Within said chamber With its neckprojecting through the diaphragm aperture, said vessel being so formedas to closely fit said chamber, for the purposes specified.

L. In a fire-extinguisher, an elongated oylindrical vessel having aconically-shapml discharge end havinga threaded aperture at the apex, astop-cock having a threaded shank for cooperating with the threadedaperture of the conical portion of the vessel, said vessel including aninwardly extending portion adapted to be extended into the vessel, theother end of saidvessel being internally threaded, an integrally-formedapertured diaphragm located near said internally-t1]readed end to dividethe elongated vessel into two compartments, said diaphragm havingacentral aperture, one of said vessel-compartments adapted to receive asealed containing-vessel having a neck for projecting through theaperture of the diaphragm, a screw-threaded closure member for saidinternally-threaded end of the vessel and means carried by saidscrewthreaded member for puncturing or breaking said containing vesselwhen desired.

5. In a fire-extinguisher, an elongated cylindrical vessel having adischarge-a ierture at one end, a stop-cock held in said aperture andhaving an extension projected within the vessel, said vessel beingformed near its opposite end with an integrally-formcd apertureddiaphragm, said vessel at the diaphragm end being internally threaded, ascrew-threaded closure member for cooperating with saidinternally-threaded end, said closure member having a screw-threadedapertn re and a threaded extension, an apertured cap having a threadedportion for cooperating with said closure-member extension, said closuremember being provided with agland, a stem passing through said aperturedcap, said gland and said threaded portion of the closure member, saidstem having one end threaded and provided with a conical point, a handleconnected with the other end of the stem, a stoppin for regulating themovementoi the stem, said internal diaphragm being so arranged as toform a chamber between itand the closure member, a sealed vessel havinga neck held within said chamber with its neck projecting HARVEY W. MIX.

Witnesses:

ROWLAND BRITTAIN, ELLIOE W EBB ER.

